The term describing a branch of the service is 'Naval'. This refers to the United States Navy, which is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The mission of the Navy is to maintain, train and equip combat-ready Naval forces capable of winning wars, deterring aggression and maintaining freedom of the seas. The Navy is responsible for the protection of the United States and its interests abroad, and is the largest and most powerful navy in the world.